Hashify.me lets you store an entire webpage in a url. As I recall it links bitly addresses. This lets you store up to 22500 characters. Now you combine that

Hashify.me lets you store an entire webpage in a url. As I recall it links bitly addresses. This lets you store up to 22500 characters. Now you combine that with this in a bookmarklet / plugin. Add some obfuscation so bitly or whatever url shortener you use has a hard time detecting you and so the wrong anchor or no anchor shows an innocuous page. Now the host isn't aware of the existence of the data nor is the encryption being done using server side code. I am of course probably missing a huge flaw, so someone tell me why this won't work and how to fix it.